Who's tan is reay for summer. This peptide can help. Tan without frying in the sun? Yep. Melanotan II boosts your body's own melanin production, giving you a natural bronze with less UV exposure. Plus, it comes with some surprising extra benefits Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and longer lasting than Melanotan 2 has human research going back over 25 years showing significant increases in sexual desire and erections in men with erectile dysfunction (PMID: 11035391) Melanotan 2 activates melanocortin receptors, while this Melanotan: Get a Real Tan with a Peptide Revitalyze MD Melanotan II Erectile Dysfunction: What the Evidence Shows and Practical Considerations